The Pace Americas DSL Filter Model LFT4-1 is a set of three white filters designed for single line phones. Made by Pace Americas, these filters feature a 2.5mm jack male connector on one end and a DSL/phone (RJ-11) female connector on the other. The flat cable design makes it easy to use and portable, while it is compatible with the Americas DSL system. Made in China, these filters provide a reliable solution for filtering out unwanted noise on your phone lines.